Showing papers by "Aalto University published in 1973"
TL;DR: The empirical relation between the pick-off annihilation rate of the orthopositronium atom and the surface tension of molecular liquids published recently by Tao was found to be valid also in binary mixtures of water with methanol and dioxane as discussed by the authors.
Abstract: The empirical relation between the pick-off annihilation rate of the orthopositronium atom and the surface tension of molecular liquids published recently by Tao was found to be valid also in binary mixtures of water with methanol and dioxane. With the aid of the surface tension the pick-off rate was correlated with the parachor. From the additivity of the parachor a new additivity rule was derived for the pick-off rate. It is valid for both molecular liquids and binary mixtures. The connection to the parachor indicates also that the square root of the pick-off lifetime is a linear iunction of temperature and of the inverse of the viscosity. This simple law was found to be compatible with several earlier experimental results. (auth)
21 citations